Union Public Service Commission
Combined Defense Services Exam (I) 2018
General Knowledge
Q1. Which one of the following elements is used as a timekeeper in atomic clocks?
(a) Potassium (b) Caesium
(c) Calcium (c) Magnesium
Q2. Which one of the following elements is involved in the control of water content of the blood?
(a) Potassium (b) Lithium
(c) Rubidium (d) Caesium
Q3. Which one of the following gases dissolves in water to give acidic solution?
(a) Carbon dioxide
(b) Oxygen (c) Nitrogen
(d) Hydrogen
Q4. Which one of the following elements is essential for the formation of chlorophyII in green plants?
(a) Calcium (b) Iron
(c) Magnesium (d) Potassium
Q5. Consider the following chemical reaction:
aFe2O3(s) + bCO(g) ’ cFe(s) + dCO2
In the balanced chemical equation of the above, which of the following will be the values of the coefficients a, b, c and d respectively?
(a) 3, 2, 3, 1 (b) 1, 3, 2, 3
(c) 2, 3, 3, 1 (d) 3, 3, 2, 1
Q6. Why is argon gas used along with tungsten wire in an electric bulb?
(a) To increase the life of the bulb
(b) To reduce the consumption of electricity
(c) To make the emitted light colored
(d) To reduce the cost of the bulb
Q7. Which one of the following is the correct relation between the Kelvin temperature (T) and the Celsius temperature (tc)?
(a) These are two independent temperature scales
(b) T= tc (c) T= tc- 273.15
(d) T=tc + 273.15
Q8. Sound waves cannot travel through a
(a) copper wire placed in air
(b) silver slab placed in air
(c) glass prism placed in water
(d) wooden hollow pipe placed in vacuum
Q9. Which one of the following is the value of one nanometer?
(a) 10-7 cm (b) 10-6 cm
(c) 10-4 cm (d) 10-3 cm
Q10. Consider the following statements:
- There is no net moment on a body which is in equilibrium.
- The momentum of a body is always conserved.
- The kinetic energy of an object is always conserved.
Which of the statements given above is/are correct?
(a) 1, 2 and 3
(b) 2 and 3 only
(c) 1and 2 only
(d) 1 only
Q11. Working of safety fuses depends upon
- magnetic effect of the current
- chemical effect of the current
- magnitude of the current
- heating effect of the current
Select the correct answer using the code given below.
(a) 1, 2, 3 and 4
(b) 1, 2 and 3 only
(c) 3 and 4 only
(d) 4 only
Directions:
The following seven (7) items consist of two statements, Statement I and Statement II Examine these two statements carefully and select the correct answar using the code given below.
Code:
(a) Both the statements are individually true and Statement II is the corrct explanation of Statement I
(b) Both the statements are individually true but Statement II is not the correct explanation of Statement I
(c) Statement I is true but Statement II is false
(d) Statement I is false but Statement II is true
Q12. Statement I :
By far the most common topographic form in a Karst terrain is the sinkhole.
Statement II:
Topographically, a sinkhole is a depression that varies in depth from less than a meter to few hundred meters.
Q13. Statement I:
Incised meanders are formed in the mature stage of a river.
Statement II:
Incised meanders are characterized by rejuven-ation and upliftment of land.
Q14. Statement I:
Portions of glacial troughs may exhibit remarkably flat floors.
Statement II:
The flat floor in a glacial trough is produced by uniform glacial erosion.
- Statement I :
In Tundra climate, biodiver-sity is comparatively less.
Statement II :
Tundra climate has less reproductive warm period.
- Statement I :
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth.
Statement II :
The Earth rotates from west to east.
- Statement I :
A person may suffer from tuberculosis if she/he frequently visits crowded place.
Statement II :
Bacteria of tuberculosis spread through droplets by sneezing or coughing.
- Statement I
Bioaccumulation is a process of progressive accumulation of heavy metals and pesticides in an organism.
Statement II :
Large fishes of the pond are found to have higher concentration of pesticides than planktons of the same pond.
Q19. Which one of the following is a true fish as per the biological system of classification?
(a) Silverfish (b) Jellyfish
(c) Cuttlefish (d) Flying fish
Q20. In which one of the following types of connective tissues in animals does fat get stored?
(a) Adipocyte (b) Chandrocyte
(c) Osteocyte (d) Reticulocyte
Q21. Which one of the following pairs about organ/part that helps in locomotion is not correctly matched?
(a) Euglena : Flagellum
(b) Paramecium : Cilia
(c) Nereis : Pseudopodia
(d) Starfish : Tubefeet
Q22. Lysosome is formed from which of the following cell organelles?
(a) Nucleus
(b) Endoplasmic reticulum
(c) Golgi bodies
(d) Ribosomes
Q23. A protein is synthesized in the endoplasmic reti-culum bound ribosomes and it targets to the inner thylakoid space of chloroplast. How many double- layered mem-brane layers it has to pass to reach its destination?
(a) 2 (b) 3 (c) 4 (d) 5
- Which of the following causes adiabatic temperature changes in atmosphere?
(a) Deflection and advection
(b) Latent heat of condensation
(c) Expansion and compression of the air
(d) Partial absorption of solar radiation by the atmosphere
Q25. Which one of the following is applicable to collision-coalescence process of precipitation?
(a) Clouds which do not extend beyond the freezing level
(b) Clouds which extend beyond the freezing level
(c) All types of clouds
(d) Cirrocumulus cloud
Q26. Which one of the following places of India experiences highest atmospheric pressure during winter?
(a) Jaisalmer (b) Leh
(c) Chennai (d) Guwahati
Q27. Match List-I with List-II and select the correct answer using the code given below the Lists:
List-I List-II
(Hypothesis/ (Propounder)
Theory)
- Planetesimal 1. Kober
hypothesis
- Thermal 2. Chamberlin
contraction
theory
- Geosynclinal 3. Daly
Orogen
theory
- Hypothesis 4. Jeffreys
of sliding
continent
Code:
(a) A B C D
2 4 1 3
(b) A B C D
2 1 4 3
(c) A B C D
3 1 4 2
(d) A B C D
3 4 1 2
Q28. Bright light is found to emit from photographer's flashgun. This brightness is due to the presence of which one of the following noble gases?
(a) Argon (b) Xenon
(c) Neon (d) Helium
Q29. Which one of the following is not a characteristic of a compound?
(a) Composition is variable.
(b) All particles of compound are of only one type.
(c) Particles of compound have two or more elements.
(d) Its constituents cannot be separated by simple physical methods.
Q30. Which of the following substances cause temporary hardness in water?
- Mg(HCO3)2
- Ca (HCO3)2
- CaCl2
- MgSO4
Select the correct answer using the code given below.
(a) 3 and 4 (b) 2 and 3
(c) 1 and 4 (d) 1 and 2
Q31. Which one of the following elements will be an isobar of calcium if the atomic number of calcium is 20 and its mass number is 40?
(a) Element with 20 protons and 18 neutrons
(b) Element with 18 protons and 19 neutrons
(c) Element with 20 protons and 19 neutrons
(d) Element with 18 protons and 22 neutrons
Q32. Which of the following represents a relation for 'heat lost = heat gained'?
(a) Principle of thermal equilibrium
(b) Principle of colors
(c) Principle of calorimetry
(d) Principle of vaporization
Q33. Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes
(a) 2R (b) R/2
(c) 5 R (d) 3 R
4 4
Q34. When the Sun is near the horizon during the morning or evening, it appears reddish. The phenomenon that is responsible for this observation is
(a) reflection of light
(b) refraction of light
(c) dispersion of light
(d) scattering of light
Q35. Match List-I with List-II and select the correct answer using the code given below the Lists :
List-I List-II
(cloud) (Characteristic) A. Cirrus 1. Rain-giving
- Stratus 2. Feathery
appearance
- Nimbus 3. Vertically
growing
- Cumulus 4. Horizontally
spreading
Code:
(a) A B C D
3 1 4 2
(b) A B C D
2 1 4 3
(c) A B C D
2 4 1 3
(d) A B C D
3 4 1 2
Q36. Which one of the following is not an exclusive right of the concerned coastal nations over Exclusive Economic Zone (EEZ)?
(a) Survey and exploitation of mineral resources of ocean deposits
(b) Exploitation of marine water energy and marine organisms including fishing
(c) Conservation and management of marine resources
(d) Navigation of ships and laying down submarine cables
Q37. In which one of the following groups of States in India is the Integrated Coastal Zone Management (ICZM) Project being implemented as a pilot investment?
(a) Gujarat, Kerala and Goa
(b) Kerala, Karnataka and Andhra Pradesh
(c) Gujarat, Odisha and West Bengal
(d) Maharashtra, Andhra Pradesh and Tamil Nadu